Polyester polymer recovery

Details Polyester polymer recovery Polyester polymer recovery

1976-04-05

1977-12-20

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 332R, 260 336R, 260 328R, 260 338R, 260 75T, 264 37, C08J 1104, C08G 6370

Patent

active

040640795

ABSTRACT:
Polyester fibers are dissolved and solid linear polyester polymer recovered for use in the production of new linear polyester products, particularly polyester fibers or filaments, by the process of dissolving the fibers in a non-depolymerizing dissolution solvent for polyester characterized by inclusion of carbocyclic rings in its structural formula under dissolution conditions for polyester polymer; thereafter quenching the polyester solution; and separating the solid polyester from the solution.

REFERENCES:
patent: 2742440 (1956-04-01), Stott et al.
patent: 2762788 (1956-09-01), Siggel et al.
patent: 2945840 (1960-07-01), Roberts et al.
patent: 3696058 (1972-10-01), Teti
patent: 3935169 (1976-01-01), Reen
Korshak et al., Polyesters, Pergamon Press, Oxford (1965) pp. 298, 299.

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